Kia Forte: Engine Control System / Heated Oxygen Sensor (HO2S)

Kia Forte 2019-2023 (BD) Service Manual / Engine Control / Fuel System / Engine Control System / Heated Oxygen Sensor (HO2S)

Specifications

Specification

HO2S [Bank 1/Sensor 1] (Linear type)

Item	Specification
Heater Resistance (Ω)	2.4 - 4.0 [20°C(68°F)]

HO2S [Bank 1/Sensor 2] (Binary type)

A/F Ratio (λ)	Output Voltage(V)
RICH	0.6 - 1.0
LEAN	0 - 0.4

Item	Specification
Heater Resistance (Ω)	Approx. 9.0 [20°C(68°F)]

Description and operation

Description

Heated Oxygen Sensor (HO2S) consists of zirconium and alumina and is installed both upstream and downstream of the Manifold Catalytic Converter. The sensor output voltage varies in accordance with the air/fuel ratio.

The sensor must be hot in order to operate normally. To keep it hot, the sensor has a heater which is controlled by the ECM via a duty cycle signal. When the exhaust gas temperature is lower than the specified value, the heater warms the sensor tip.

Schematic diagrams

Circuit Diagram

Harness Connector

HO2S [Bank1 / Sensor 1]

HO2S [Bank1 / Sensor 2]

Repair procedures

Inspection

1.	Turn the ignition switch OFF.

2.	Disconnect the HO2S connector.

Measure resistance between the HO2S terminals 2 and 5 [B1/S1].

Specification : 2.4 - 4.0 [20°C(68°F)]

Measure resistance between the HO2S terminals 3 and 4 [B1/S2].

Specification : Approximately 9.0 [20°C(68°F)]

5.	Check that the resistance is within the specification.

Removal & Installation

Note that the SST (Part No.: 09392-1Y100 or 09392-2H100) is useful when removing the heated oxygen sensor.

1.	Turn the ignition switch OFF and disconnect the battery negative (-) terminal.

Disconnect the connector (A), and then remove the sensor (B).

Heated oxygen sensor:

39.2 - 49.1 N·m (4.0 - 5.0 kgf·m, 28.9 - 36.2 lb·ft)

[Bank 1 / Sensor 1]

[Bank 1 / Sensor 2]

Install in the reverse order of removal.

•	Install the component with the specified torques.

•	Note that internal damage may occur when the component is dropped. If the component has been dropped, inspect before installing.

•	DON’T use a cleaner, spray, or grease to sensing element and connector of the sensor because oil component in them may malfunction the sensor performance.

•	Sensor and its wiring may be damaged in case of contacting with the exhaust system (Exhaust Manifold, Catalytic Converter, and so on).

Knock Sensor (KS)

Specifications Specification Item Specification Resistance(MΩ) 4.87 Description and operation Description ...

Rail Pressure Sensor (RPS)

Specifications Specification Description and operation Description Rail Pressure Sensor (RPS) is installed on the delivery pipe and measures the instantaneous fuel pr ...

Other information:

Kia Forte 2019-2023 (BD) Owners Manual: Removing and storing the spare tire

Turn the tire hold-down wing bolt counterclockwise to remove. Store the tire in the reverse order of removal. To prevent the spare tire and tools from “rattling” while the vehicle is in motion, store them properly. If it is hard to loosen the tire hold down wing bolt by hand, yo ...

Kia Forte 2019-2023 (BD) Owners Manual: Checking tire inflation pressure

Check your tires once a month or more. Also, check the tire pressure of the spare tire. How to check Use a good quality gauge to check tire pressure. You cannot tell if your tires are properly inflated simply by looking at them. Radial tires may look properly inflated even when they ...